Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89b81121dc0e21ed20174a0978a9b2f1b179d9db92f00cb6823ce01e35ce6c66' 
  AND token = 'w7zKABFQhUlUusllBumbPLAMMjRLoPsWr1W5FNuZjRU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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