Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f6c0e3816ecee076273475fee1dbd79310b88ae8a2d6a3b01217f37c73221d8' 
  AND token = 'j99CtbRE9/vO0UF8rdLa6fnWYQ9uTKRuqq1ytAOR9uo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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