Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e76adfa995ae5703eee1f67c37811b5bb548d750b8008a1e349663dcae967c63' 
  AND token = '+osuxoMNyMjmd9z2y3dbC18eb/RQ0da5+WNYp+MYctE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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