Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29d09a9b8dea6c0fb2f70acc71adc5b7556623bbfbd1b90e04b8dd57f5e2c81f' 
  AND token = '3HDoTYECyio9kqbDMIduXw8iRbb1JSkyhdzGoqVV+r4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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