Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e3cc98a7e17bc4f2a76a9440eb1654e8dd779fc7f657150fd6df731ad34830e' 
  AND token = 'KNyzM7bk4nOzzA3lVRaOGkioXU1KhSkwHOdYWMzgGFo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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