Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d0b1354e69b8910465acc75d96c42f7ca4883ea4fb5d1e5e7465157069b0159' 
  AND token = 'lMOR9bdOaEAeazTGc/CCK4X7c1MEvdbS7eXXQIsakOA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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