Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e7ee021e012cc17b122e1bed44c64cc7c6ff4e45aad24d7bafe8e7aafbe35d6' 
  AND token = '8MOhDIcBSxYld/hlDUSkqaMPWmg2e25jNhUO20ApZZc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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