Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '463564314dad88314b60bded45b264b2ee80ab540482a2b3171cda4c3bd7a867' 
  AND token = 'bqCxMrTwOUoHjhndRKdgb56AQ0ik+GrxNvMGLGDMC58=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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