Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4332b6f062171d672e5381bcf822e8eea01ecf8ae2092c26d5fbf6112f7dc142' 
  AND token = 'UUnVSIgpRznekJA0hdxt0p7vKDVIWj8DuvDvAeTFCLo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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