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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80a98fbaedb3e3344c49bf7169586525f799cf81cbedf2c8bcebabff6eafecf4' 
  AND token = 'jx4hWXhdUnzWJ42AgX8xdP9Zh/8++TLlGzTK0N8Au3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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