SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1fe2b90ddd6c1291ee20b45ef1317a6e97893491d1c2b4438f980a32588d8c5' 
  AND token = 'GFMb+Fm5ZHJIz39wBZU5pXxpgIBrzDarmFL94JrOYT8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00110

JSON explain

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