Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c6730a4fd100b34c32598f60ef467fbda3a6188c340439b00c65fbd0996af9d' 
  AND token = 'X+svmn0zkIS090UQmQnvIUQ5PXr7pW4NKCZyyXsxxPQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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