Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ef3557b1aefe8167f9947124c7ccd4af3ae31e2e7ff12f082f3830022cc8bee' 
  AND token = '8CRkSIqnzzbOJi3ddaftWMrNaZHCmenuW1yef3B9CUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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