Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0bafb581ada36367b6907ad768d8c3bdccd39e091b5b9993bff750e30995e0e' 
  AND token = 'G3d9HnxzDzGG4ARF4d3uKklc6WXi81h/h6GvC9TMQ3g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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