Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '804e84e68488446cdbd3fde6cec413470eaddc95dc92e6c8ff3da50e0dc75736' 
  AND token = 'jDVT9Gb07Ee1kjuTNze9FA02XH3/8BW+Ivrn3FY+B/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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