Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3068de19b60d4d7e4fd687a2b715fd2d6529e1d2b7dfeac151136b83691a570e' 
  AND token = 'bRAZqOZ0dW5/yywbe2Slvir711PVKn/U5XkmE0psw/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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