Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '249446d8aa153929c0a8de3a3cd2fb36fbf9c3577844927fa46f1ca7b07eca19' 
  AND token = 'brYd/2bNwPEZTd70gKXKApyfUXF+gTGYBt0c+Knoyr0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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