Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8d8141989a44dc621e08d47514b97a38635c6b2ee09c432639af9e700f64537' 
  AND token = 'hN9ZIE7zNvrMv4akdXqMz3vmFMts9sXRDhA4W/CpJLQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}