Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cbae8798101910fe3a1eae58b2f3be595cff2998d5a68f9a889e02dbdacb7a4' 
  AND token = 'I/IIHp8u9y8Coid4GZunM8ITb99dZ43xKMLoSZ6neyI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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