SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9faf315a3e61f226781706874795489335fcd26842c1ac64a5a5dbe933e89862' 
  AND token = '5y9Q7zOqhuZXsg8iUT4dXfuBUqgEpPxrQ9lHuROEqHA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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