Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a57804eb3545047c9d8a46722f1174fe2870be2d054d194101e142d3922bf3ed' 
  AND token = 'I9ReCBRl0M1cI1BeotIK1aOUG0Md0pD7SuZ6Od9hEks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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