Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '68153e7f7bdae46849b8e84648fd22ffa0c08bf2179b66362cbab4c7509bbb0b' 
  AND token = '37heG94BDG03PlX8eDd09PXBeIP8OZSerl50P7H1ML0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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