SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2562cccc8b0e45a9332989a3767e6c3e1b1cf6ea965edc2d04d59f1e76e24369' 
  AND token = 'LB8hTQ+KtvWzqvGIigl9YcUvAeb0uS4XfLobDjK9raw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00069

JSON explain

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