Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb3b7220e794d6d9eb472866e4f5044f5f9af80a92d66cfb350f1ff6a2ff6d83' 
  AND token = 'LU/N0r7uWP/8kTuCUtrA6/z2XLFrgQUMuSYOdgIAe6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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