Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7378d0635bc91a4325b7b207aa6bd3d8c1501c27272cc3ab4f54593a8c4a7430' 
  AND token = 'fBzMoKaa5hLMc12LrCwCgC3YjYyuJZ+rxy0kGIY0eHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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