Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5fa6b5b0ae80f41e7841b4a9d2434b5e792cc5fc4b39e3989f61db1b4a2065fe' 
  AND token = 'MATQiNzDmvbsDWE8tHKA/p9d+diFQ8fxpIgtGH3B3tk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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