Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b593a8861c04ea4014b1905d89a79d3ec6479a3b52a36e88ccff0a54e3e8567a' 
  AND token = 'bL4O8WFvyTmf2AkVrfEP7tq8tkK1qUQ8turmoQKKwaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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