Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '195bb9a248d6daeedd7f2cd9c0d4365d027fa9edba191106ed73564fab7090c4' 
  AND token = 'iuzgRLYj6b6FMYIgzweChS/M8fikVTLraKga51hXyoU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}