Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc01e43817472408468076bee93ee5f023eb52d002946f543567b5beda12174d' 
  AND token = 'y/ia1rVakMHP2uyCtBGPL4jIG+a4uq/HsW49rK08zXM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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