Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52de40caceeefcf4ef79daa6005e19709a2565e20c114f37f6391c414ca1b8be' 
  AND token = 'DD/WNx+eO9lY1mUZh3XUMZJ2oLfJb7sVzUwVSW9GqSs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00062

JSON explain

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