Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9c93220ceb31e9f2a101acd5eab75bc5af5489f6010666c333b34f34fc15db1' 
  AND token = 'J/iZfgqlDRw+kdexm660E6r1JF6LgA/+q8UKCktMrA0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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