Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f6f6e3460d1aba3ee0248673566be6c8e3b7a31b2b2f2048e45881e210a9229' 
  AND token = 'EWY74ijcjvZx8HUoipiKrRVlJfI8o1vKKxa6RJIPKUA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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