Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '179ad9f7388d7e8224c66d154614236862ad3b7ad9e088a05615c78d64ac87db' 
  AND token = '5TChsyLiWYe4rk1z6KpYWqkpUDl6EGGngAkgoc4xz0A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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