Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e0f47f3d20756a123a34ce7ce51404685f8fddd8c28a10f72349661948e4e9e' 
  AND token = '2yeFKuciacBYgWvwmS3Yx7JIvq6R/HoKpcdObNqZivY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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