SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c1cd3856a0452fa033d5f5d9b699131ebad540b55b3c664477f00ade472c508' 
  AND token = '2Yv4E/vc/eOx9hzLIVksGhJ6TroYm1R4sfnUUH7tlmw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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