Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fc083168db272f7e5b750b6a4d05748f896c03338f8ae6988ff9edf62e06f8e' 
  AND token = 'L/lSYgfBcqG5c+Oeef9Ng4AmxPI+KXK29K3KU6n7Qp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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