Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '304e697c05005bdb9165ddbd5f6a10edc29e6e1781e21b61eb8dd5e0fe1426a5' 
  AND token = 'LcJq/ijg/GjFRgggWHclXAGMcGgE2lU+b8tlmR3mjTc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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