Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '088fd654e14d784632fb2bb23e61a72e1cf9e738eae24d50662290126018f6b3' 
  AND token = 'CRXLQ9La15NLpICJwzBtAHZITcgNMYxXtjNYfTTN47M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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