Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b322d8485d3789bbc6aef4523f3173d427ec435364f503b81290f47cced10d87' 
  AND token = 'eq1D4guQEU7CsmotPF55PvLrbqMd4DhC+eJoNpliAd4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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