Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26d79a6eddb4df6908af343f7244028b3314591569f4d2a9dd548f5bfe971436' 
  AND token = 'Xa3dihgSaQfsIXVzEw9eJ5weGXY8y50gYfe5DwRGUYg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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