Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67b4c52e8ca4417c91d1856ef63649d585bd482d45d44e95b4afc23339054b77' 
  AND token = 'rha6XOVJXB1PiO/IRC0CH1Nxee4BOFrAZkLSBV9Ae1s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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