Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57b11ba1569c54aff9544610ec6c5103d942112ff7d6a548bd44f2a9591ac5e6' 
  AND token = 'XCGeikA6w2JCsryUXLW//amBFgfJKb3ufjHJNBUbLss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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