Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44641120e65f1a9d6192c236f2a9049ae495f147f54d97ae80fcf52d7bc5d2e5' 
  AND token = 'mWnbcBK+ipw1RfaqV4F3j55ADOHPQYWdHNLpPjC8lsw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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