Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16074a5b851b59b93048cd08a0c1e175a41daa43d5c61e1ebba86a49e93b4e12' 
  AND token = 'cfbNcMlgd8IF+zNHHOiTPDhreQCmAhBDveAf5xm/xA8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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