Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8e304003f20072c0c60fde843a862000a121811cae563601cd3f7c2d662520a' 
  AND token = '6MgHqVJKWeFehEGm4wkNVf8Doq5+9jV70VNta4eIq78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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