Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82008ec0c6aeec9f33f19073a088ec08fe57319664ee94c21f716aa61fcb52d0' 
  AND token = 'NgkhGIJEJRnrV+NDcE+neTZJjX1tUXrp80j5/545nk8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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