Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb736357f940b9622be882ba715b3c7440260630d787003a0524d93e2ac024c8' 
  AND token = '7wYvJeRsAGhquFREViXqxIc3Wl7lyd2NTL9PNohR/VM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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