Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01a6c3fa598996601fdd99a3ec5a199f40ccedae6737c2ddb66cc3bcd66a0dd0' 
  AND token = 'jfbp+43dkKR10iruBv8N7f3MridgaMm9cmNPd/R71XQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}