Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5e3d5c59dd9c2b9bb0ba5b45fff7bc9a327847c52c6856b0666ff56797c2d17' 
  AND token = 'sclwyspfZ/2astz5w8F5P9PynXVz1webA+D/CJ7lpqc=' 
  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"
    }
  }
}