Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '775dd9ccaf69e7d0aeec1efbc4de56fd03d05d88e557d435c704e6f596017d37' 
  AND token = 'oRbHIu9vc9MYdmVu8Xvs0Z2106sOwV7Hap+Sb/TBnFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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