Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4453bdb5762dc09a817289df37d13acbde7231a44e90a4d60bc40c09a32950fe' 
  AND token = '6G0zmlJl3n8PwAqRxUe38szyLN6dHgDBkitkFrV7Ytw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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