Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1625fa35d8bfcfb12cccf879d1c8b025ea69352096438ba6db9aaa300a0aae30' 
  AND token = 'hM3aT7YrqMUJ4UG8UH3pIkI9llyagH4GdzmD02k0p14=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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