Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a29311fa9bb1d33853cbb0b8ce5b9278d1ee5ae917825110582ea1ff308630d' 
  AND token = 'xcJBa+X25ixJNS0JPoEsNgHnhGIsIIQxW/Zsp65nmAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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