Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '51f754ee3da72d638474b90028c4f8f67b1b64611eb2f3e7c78c21a7937feb26' 
  AND token = 'ecZL3sUAnX0JM0En57H+K3jOIAeZNsvTV7iIqKyrYZk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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