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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5a1c752f3047bb32fda4fb6375f562a66c930029ad00dcaaed2813d954251e8' 
  AND token = 'pQZ430vfE1CKnKmdkW3oLApH30eF1+7S3CwgiEdzl8E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}