Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '987779b99af2113aed83fbaaaf03fc515f79e6bd249c29310e66c832a5f3f88a' 
  AND token = 'v9OaSzm9uITvQ2NaLzopVsf7aZPCpy7+EYwO78PpeS0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00821

JSON explain

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