Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '005b6c716be1a65a7b2dbff6f0b6cb8934e6d9210e9f9c9d59a8f416f0366836' 
  AND token = 'h1w0jTRHXmylv7ehbRpngC3/WOMxd1ATcMB1mcgP1QA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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