Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b0dbde627a88744d9f7f235815a13ed29a990bc9d55eaf00fd7fdf0dccdb6e6' 
  AND token = 'gB5baXbnfwkXxXaT5s1jnIMBE4WSmV3+f1Keld1exRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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