Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5635d8ff63ef74d58be8c040b53514060aeb3c855b261a164a4ce6664748d32' 
  AND token = 'haKRaLjLUyzgXuPmOCLyJcuamJkU28vdHbquVVH8grY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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