Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7769b9e15b34c27fe8d014bc4fee91e391fa18c1f94c6a13dd6204451210c20c' 
  AND token = '1xljNgBGD7R01umaqNp7/iEoGsm+/V5pjIsj3OG+4mk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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