Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e30048ffde734adeccd23aaaf33864ebe7bf562ea73093a3a426600cbba9b92' 
  AND token = 'k+g7IZ6fKYG59BJ/oGywh820kNFGESBWfWzd/gWHO2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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