Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7638448eb9ff2ea6a1566b7577a94212cb03ee42982ad30fff089651bc7d2750' 
  AND token = '4eweTX/8Cqor2HsqSplwFLAdb14VeVQglNQM7J5rchA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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