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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05fad6c7044807bae6c5a75a89edd686d3580f5414e5f5cff21a133518fd092f' 
  AND token = 'ikkPJO/t0Ja5g/dS54/n0fdf05D0dW07odVsjykLfWA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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