Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5df96e84b18543b98527c483bca44dbb07ae086a691106c5ece3c56f04587180' 
  AND token = 'GOUhTbp8VEC5ypFT2UQh8BBtE4R0ieW5rsjeF1rU2Zs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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