Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e819a65ca9326490eb80c52065379c3c34e6ac48700a0d1884fce97407301d3' 
  AND token = 'LZuMXXTE1XUuYBfNfAy+kIqTqgC8gZ+BM9OuMGKLWeQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}