SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11fba715954db9b3bd587127be00a6b42fced70b36929f0f41b7a629c03a0154' 
  AND token = 'Di+M97GGq/kzgjE+A9QQ3nJRz2vxfg/CCyPSIvpziq8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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