Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e367d574c131753e6e5c8474e4f84b78523a445fcc64feb118f18beb388e3ec1' 
  AND token = 'xOr91nQb+FD6sVpC8nOp4Ab86A6v0A19WiHQKWe9T1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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