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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41e762283918383867d4a37b69b66c036561c340935f0ffcaad1141bc2dc734d' 
  AND token = 'Ge4qBFMVNcBgtjXOIVqlnZw7E2fG59P6Vc2nODl6S70=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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