Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3221aa2254870bc7db3ca47839611f312109b0ea277cd85580f59de9c220a9be' 
  AND token = 'bLkehMHY/pKFhUX3xbt1icL/r5xM0v6C/diaTgQHFh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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