Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9dd07ecd9ebf4f8f151b3881a51455eaabae02c9e9e8b6b5313340592316c971' 
  AND token = 'qG7SFZuVe7Mbb5y22mzq0den69wlO2ACo+6+aaTUtJQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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