SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67263d515f643a82d3f52cd0a6a564424b8148c7d6b5a3439f730d92d048ac94' 
  AND token = 'qeSTRvjGWS1Ehl/WbqYHWFQvPLuF/rsu3BmBnEDqOPM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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