Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88ef618c326193470ea77dc8d534fec0da0c22fd5d63abc2ae6bdde7cfd7400d' 
  AND token = 'opIAkrfgKgiPs99jwWhqFqBCxreEs32DB49HTGT3NzI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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