Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '639676b858b9a5bbd505f9b5ab5727d8a8cca219a5b4dc3b6ff882fec89efb10' 
  AND token = 'gDb4hfw9rb2oQCDH33ojeOy9roHlpkIniEFRvC8CFyM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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