SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4981198156403bbcef14484b87377dde7d91526a6aff8ceef405a248372df158' 
  AND token = 'TmORw8VgGMxxNbTOk0gGCDuhE6ZBcs/9KIAm2UFIaE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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